Lubricator.



F. s. OLIVER.

LUBBIOATOR. APPLICATION FILED JULY 2 4 1 9 l 1.

.7 l\ Ill /9 X Y W Jfl'm, mut/"m6 I Patented Feb. 6, 1912 f "t tle FRANK- s. OLIVER, oF rorHAM BEACH, MAINE.

Application filed July 24, 1911. Serial No. 640,279.

LUBRICATOR.'

' Specification of Letters Patent.

Patented Feb, ti, 1212.

To all whom it may concern:

Be it known that I, FRANK SJOLIVER, a

citizen of the United States, residing at especial reference to the type known as force lubricat'ors, manually operated or adapted to be connected to some moving part of the machine to be lubricated and operated there by, for supplying hard grease or other lubricant.

The object of my invention is to provide a reliable and economical device, and the invention consists in certain improvements in construction which will be fully disclosed in the following specification and claim.

In the accompanying drawings, which form part of this specificationz-Figure 1 represents a top plan viewh- Fig. 2 is a vertical transverse section and Fig. 3 is an 'en larged perspective of the key to prevent the piston turning in the cup.

Reference being had to the drawings and the designating characters thereon, thenumeral 1 indicates the body ofthe cup, which is provided with a "screw-threaded exten-- sion 2 and an angular faced member 3 for securing the cup to a journal box or other part of a machine to be lubricated.

4 indicates the piston or plunger which engages the wall of the on closely and is provided with grooves 4 in its periphery and with a rod 5 having a left hand thread 6 thereon; v V

7 indicates the top or cover of the cup which is secured thereto by a screw threaded connection 8. The cover is provided with a voke 9 integral therewith and in the center of the cover is an opening 10, and opposite thereto in the yoke 9 is a like opening 11, through both of which openings the piston rod 5 passes and closely fits therein, thus keeping the piston 4 in alinementwith the wall of the cup 1 and causing it to move therein with the leastfriction.

12 indicates a feed-wheel located between the top of the cover 7 and the under side of and engaged at its upper the yoke 9 and screw-t the piston rod '5.

13 indicates a vertical slot inthe piston rod engaged by upper face of the yoke 9 by a screw 15 and prevents the rod and the piston revolving on their axes as the piston is forced own by revolving the feed-wheel 12 to supply lubricant. The wheel 12 may be operated by hand, or it may be connected with some moving part of the machine to be operated readedly engages intermittently and automatically. In the piston rod 5 is a bore or passage 16, provided with a rod 17, having a valve 18 at its lower end engaging a valve seat 19 on the inner or lower face of the piston 4.

20 indicates a chamber at the upper end of the piston, rod, in which is a spring 21, seated on the bottom of said chamber 20,

22,. for applying tension' to the spring hold the valve 18 to its seat 19. "When it is desired to withdraw or remove the piston 4 I fromthe cup, the valve 18 is opened by depressing the rod 17, enter the cup below the piston and destroy which allows air to the vacuum therein, when the piston can be removed by unscrewing the cap or cover 7. In removing the piston for renewing the supply of lubricant, the operative parts of the lubrica tor remain in their normal position, the piston is run out against the inner side of the cover or top, and the several parts are again assembled. .The feed-wheel being located between the cover and the yoke cannot be detached from the piston rod by'meddlers orby accident and the cover and the yoke alternately furnish the resistance in the revolution of the hand-wheel to operate the piston in a vertical plane.

a key 14, secured in the end by a member" In replacing the piston 4 and the cover 7,

the air. trapped between the lubricant and the lower face of the'piston is released by the valve 18, and the piston allowed to engage the upper surface of the body, of the lubricant to bedisplaced by the mani-p'ulation of the hand-wheel 12. l

The lubricator as' constructed, is simple 9 compact and etfective in operation.

-Having thus fully described my invention what I claim is A lubricator comprising a cup, a cover having a yoke integral therewith, a piston having a rod extending through said cover and yoke and provided with means between the cover and yoke for feeding a lubricant, a valve seat on the lower face of the piston, a passage through the piston rod, a valve engaging said valve seat and a rod extending through the passage in the valve seat and means for automatically closing the valve. 10

In testimony whereof I alfix my sigrmture in the presence of two witnesses.

FRANK S. OLIVER. \Vitnesses:

LYMAN Omvmz, J. H. STACEY. 

